6.5.y: Suse TW fixups

- Import Suse depmod/kmod patches - https://github.com/SUSE/kernel-source/tree/master/patches.rpmify
 - Tweak mkspec to respect Suse /usr usage
 - Run grub2-mkconfig post-install
 - Get rid of the undesired test tweak in 0013-fedora-rpm.patch added with e0c74e5e15

We may have some additional work to do as my limited testing with Arch's defconfig + _kernel_on_diet="true" didn't boot. It might actually work with the full defconfig or using Suse's using _configfile="running-kernel". I'll run more tests as needed on my main machine as it was a PITA working on this with a dualcore broadwell laptop 🐸

install.sh

@@ -282,6 +282,11 @@ if [ "$1" = "install" ]; then
         sudo zypper install --allow-unsigned-rpm $_kernel_rpm $_kernel_devel_rpm
       fi
 
+      if [ "$_distro" = "Suse" ]; then
+        msg2 "Updating GRUB"
+        sudo grub2-mkconfig -o /boot/grub2/grub.cfg
+      fi
+
       msg2 "Install successful"
     fi